What is the weak link for Chevy max tow ratings?

There isn't a weak link. A new L5P Dmax will rip the hitch off of a trailer as effectively as the other 2 and GM frames have been stout for a good long time and they use the same rear axles as Ram. So there it is. They are comparable and equally capable. Anyone who says differnet is biased and believes too much of what they read.....